Ventilator or air ejector



Jan. 8, 1924. 1,480,488

. K. M. DE VOS ET AL VENTILATOR OR AIR EJECTOR Filed Jan. 14. 1922 Patented Jan. 8, 1924.

UNITED STATE 'ZPF'ATTENT OFFICE."

KENNETH M. DE vos AND EARLE w. BAGG, or DETROIT, 'MICHIGANr VENTILATOR OR AIR EJECTOR.

Application filed January 14, 1922. 'Serial No. 529,149. 7

To all whom it may concern:

Be it known that we, KENNETH M. on Vos and Emma W. Base, citizens of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in ventilators or Air Eject0rs,.of which the following is'a specification.

This invention relates to-ventilatorsand air ejectors for apartments and buildings,

and has for its object a device of this kind whichvis calculated to work in'connection with the flue of a stove. Ventilators of this, type are not broadly new but the ventilator catch pocket to catch all material falling down through the chimney. In the construction of chimney fiues a great deal of'mortar, othermaterial and refuse falls down through the flue, very often clogging thesame. and requiring expensive operations in order to remove'the same. This ventilator is so .con-

structed that it catches all material falling 1 down from above, as will be presently ex-' plained.

In the drawings, 1 a

Fig. 1 is vertical section of the chimney showing the ventilator installed in place.

Fig. 2 is a front view of the chimney sl'lOWiIlg the ventilator in place.

Fig. 3 is a vertical section of the ventilator.

Fig. 4 is a vertical cross section of the ventilator.

Fig. 5 is a top plan view of the ventilator.

The ventilator comprises a shell in the form of a channel-likecasting a. The casting is bulbous at the center and is provided with an annular channel 6 and the inner wall p which forms at the center a cylinderlike air duct d. This communicates through the port c with the annular channel I). The shell has a neck 7 leading from the top and a neck 6 leading from the bottom.

lSecured to the face of the casting is another casting or plate 9 which is provided with an airport fitting h and a flue fitting 2''. These fittings are part of the plate which is bolted to the main casting by the long stove bolts 9'. This is well shown in the plan view, Fig. 5. The fitting It i adapted to fit in ment.

ventilator grid 71?. which may be a single castanopeningk left in the wall of the apart- Secured around this opening is a ing, asshown in Fig. 1, and whichrotatably supports an air-propelled wheel a.

The stove plpe o fits into the fitting 11 to take the'stove gases, usually a gas stove, and allow' them to escape up the chimney, the

' products of combustion going'through this fitting 2' into the flue b and then up the chimney. The products of combustion, of course,

are more or less hot, consequently they heat the'inner wallp of the channel or the outer wall of the air duct and consequently cause the air therein to rise through the chimney V flue, thereby requiring air from the room to take its place. This arrangement is such that the maximum area of the air duct is placed directly intherpath of the products of combustiomwhere the greatest heating efficiency is obtained from the gases escaping from the stove, thereby promoting a very rapid suction of the air out of the room. This causes the air-propelled wheel n to rotate and thereby indicates to the occupant of the room that the device. is properly functioning. i T The port' e is directly below the-neck fof the ventilator. The outlet" ports of the flue b that carries the products of com- 1 bustion, open into the side of the upgoing'flue which is definedin part by the neck'f. Consequently any refuse, mortar, brick or other parts falling down during the building operations'is bound tov lodge in the air'duct d where they can be easily removed by simply taking out the grid m,'or for that matter,

the grid mwill not probably be in place at the time they fall. This, therefore, forms a very nice catch pocket for materials falling V during the building operation.

Not only are air duct but all the products of combustion from any flues in apartments below strike directly against the air duct of the apartment in which the ventilator is located, thereby securing heat to promote circulation when the stove in the apartment in question is not being used. Furthermore the catch pocket in no way interferes with the draft through the chimney, yet serves to prevent any material falling down below the point the ventilator is installed.

What weclaim is:

T e ea nbina ien with a y'p the products of combustion passing through the fitting i used to heat the wher v vi'ded with a chimney fluesot a ventilator comprising a shell having an upper neck portion open at the top communicating with the chimney flue and a lower neck portion open at the bottom communicating with the chimney flue, and the two openingsoccupying substantially the entire cross section of the chimney opening said shell having a bulbous central portion provided with, a central air duct having on one side a by-pass flue connecting the lower neck ltothe upper neck for taking the products of combustion from the lower neck to the upper'neck, the said air duct connected to an air intake formed in the center having an opening or port at its top communicating with the upper neck'portion and said shell provided with a connection for communication with a stove pipe. 1

2. The combination with It chimney providedwith aflue, of a ventilator comprising a shell having a neck portion at the top communicating with the chimney flue and a neck portion at the bottom communicating with the chimney flue each adapted to occupy substantially the entire cross sec tion of the chimney opening, said necks connected by an annular flue having its axis on the hor zontal for the products of combustion which surrounds a substantially cylin- 7 drical air duct which has a port in its upper side in line with the opening in theupper neck, the said air duct arranged tov connect to an. air intake and the shell provided at the bottom with an opening communicating with said annular flue. V I

r 3. The combination with a chimney provided with a flue, of a ventilator comprising a shell having at the top and bottom necks occupying substantially the entire cross section of the'chimney opening and ing a shell formed with an upper alignment with the upper neck thereby actingas aicatch pocket'the said air duct open ing out into the room to draw the air there from and the lower end of the annular. flue connecting with a pipe fitting for communication with a stove.

4. The con1bination-with a chimney provided with a flue. of a ventilator comprist-ion communicatingwith the chimney flue, and an enlarged centralportion having-a central air. ductcastitherein which has a port in its upper side in linewith the opening .in the upper neck, said port being substantiallyof the same dian' eter as said opening, thereby to serve as a catch pocket, an annular by pass flue being tormedbetween the said enlarged central portion of the shell and the central airduct, and the said shell provided near the bottom with an opening connecting the said by pass flue w th a stove.

5. The combination with .a chimney pro-.

vided with a flue, of a ventilator, comprising a shell having a bulbous central portion having openings in the top and bottom thereof and provided with an air duct within said. bulbous portion acting, as catch pocket, said duct and bulbous portionformingvan annular lay-pass flue communicating with the openings in said shell, the annulus of said flue having a horizontal axis 'In' testimony whereof we aflix our signatures.v V

KENNETH M. DE VOS. V .EAIRLE W. BAG-G.

neck .por-c 

